| Issue | #90 |
| Published | March 1949 |
| Cover Price | 0.10 |
| Pages | 52 |
| Editing | Whitney Ellsworth (credited), Jack Schiff (actual) |
| Characters | Batman [Bruce Wayne]; Robin [Dick Grayson] |
| Genre | superhero |
| Pencils | Jim Mooney |
| Inks | Jim Mooney |
| Notes | Inker revision from Mortimer to Mooney verified by Craig Delich 2010-4-2. |
| Reprinted | in Robin Archives (DC, 2005 series) #2 (2010) |
| Characters | Batman [Bruce Wayne]; Robin [Dick Grayson]; Commissioner James Gordon; Dr. LaPointe (geologist, death); Beansy (villain); Little John Johnson (villain); Jeff (villain); Slim (villain); Batplane |
| Synopsis | Batman and Robin, in disguise, travel to Rancho Fear to track down a gang who has stolen a metal cylinder that once held a sample of a new gas deposit located near the rancho that the criminal intend to use to their advantage. |
| Genre | superhero |
| Pencils | Jim Mooney [as Bob Kane] (signed) |
| Inks | Jim Mooney [as Bob Kane] (signed) |
| Reprinted | in Robin Archives (DC, 2005 series) #2 (2010) |
| Characters | Captain Compass [Mark Compass] |
| Genre | detective |
| Pencils | Chuck Winter |
| Inks | Chuck Winter |
| Characters | Tomahawk [Tom Hawk] |
| Genre | western; period |
| Pencils | Fred Ray |
| Inks | Fred Ray |
| Characters | Merry [Mary Pemberton] |
| Genre | superhero |
| Script | Otto Binder |
| Pencils | Winslow Mortimer |
| Inks | Winslow Mortimer |
| Reprinted | in DC 100-Page Super Spectacular (DC, 1971 series) #DC-10; in Adventure Comics (DC, 1938 series) #416 (March 1972) |